Method _adjustDate

codebase/sources/dhtmlxscheduler.js:9029–9040

(direction)

      this.onStateChangeHandlers.forEach((handler) => handler(oldState, newState));
    }
    _adjustDate(direction) {
      const { mode, date } = this.getState();
      const newDate = new Date(date);
      if (mode === "days") {
        newDate.setMonth(date.getMonth() + direction);
      } else if (mode === "months") {
        newDate.setFullYear(date.getFullYear() + direction);
      } else {
        newDate.setFullYear(date.getFullYear() + direction * 10);
      }
      this.setState({ date: newDate });
    }
    _toggleMode() {
      const newIndex = (this.state.currentModeIndex + 1) % this.state.modes.length;
      this.setState({ currentModeIndex: newIndex });